SWIM has been wondering this for a while, the instability of LSA and the poor solubility in acetone/ipa have been a block in the tek though.
Apearently LSA is stable at up to 90C or so, but SWIM kept a brew in his fridge one time for a week and it lost all potency!
part of it was taken as a dose the day it was made and it was fine but a week later it was useless.
There is a chance that LSA is much more vulnerable to degradation by air and light (even fridge light) than heat so maybe quickly evaporating it then sealing in a tinted bottle would work. Also if SWIM remembers correctly the LSA tartate is relatively stable, this might help.
There are some methods to precipitate out the LSA, SWIM tried it and it didn't seem to work though.
Q21Q21's Tek: A comprehensive guide to extracting DMTThe 2 teks use non-toxic lime and vinegar and Tek 1: d-Limonene or Xylene or Tek 2: Naptha to produce very quick high yields with the greatest of ease.I am almost never on this site anymore so I will likely not answer PMs